Fanuc Power Mate i-D/H Operation Maintenance Handbook

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5. WARNINGS RELATED TO DAILY MAINTENANCE
WARNING
1. Memory backup battery replacement
When replacing the memory backup batteries, keep the
power to the machine (CNC) turned on, and apply an
emergency stop to the machine. Because this work is
performed with the power on and the cabinet open, only
those personnel who have received approved safety and
maintenance training may perform this work.
When replacing the batteries, be careful not to touch the
high–voltage circuits (marked
and fitted with an
insulating cover).
Touching the uncovered highvoltage circuits presents
an extremely dangerous electric shock hazard.
NOTE
The CNC uses batteries to preserve the contents of its
memory, because it must retain data such as programs,
offsets, and parameters even while external power is not
applied.
If the battery voltage drops, a low battery voltage alarm is
displayed on the machine operators panel or screen.
When a low battery voltage alarm is displayed, replace the
batteries within a week. Otherwise, the contents of the CNC’s
memory will be lost.
Refer to the maintenance section of the operators manual or
programming manual for details of the battery replacement
procedure.

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